Abstract
The variation of the acid dissociation equilibrium of trifluoromethane sulfonic acid in dilute aqueous solution along the liquid−vapor dissociation curve is treated by a dielectric hydration model. The computational results indicate that the dissociation equilibrium becomes unfavorable from the point of view of the free energy change as temperature is increased above 500 K where the solvent density is less than 85% of the triple-point density. These results give additional perspective for the view that insufficient hydration can result in incomplete proton dissociation from sulfonic acid headgroups in Nafion membranes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have